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Carbon microphone |
| Housed in a nickel-plated casing with a black plastic base.
Suitable for radio broadcasting, theater use, or public address systems. It was also available with a stand and a spring-based suspension system.
The standard design - featuring a metal diaphragm and carbon - was replaced by a narrow shaped Bakelite channel across the front of the microphone, with a carbon electrode positioned at each end.
The intervening space is filled with a specially imported granulated carbon material, held in place by a very thin rubber diaphragm.
For optimal performance, the microphone requires approximately 25 volts of direct current and has an internal resistance of 500 ohms.
It draws a current of only 60 milliamperes, allowing for exceptionally high sensitivity.
According to Amplion's engineers, sounds produced at an average speaking volume are audible from a distance of up to 60 feet (approx. 18 meters). |
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